TODAY MAY29
TEMPERATURE70
HUMIDITY63
PRESSURE101290
WIND COND.290 18.4
  • 7859Wed50%
  • 7659Thu
  • 7558Fri
  • 7861Sat
  • 8064Sun
daynightWeather update from Patuxent River, Naval Air Station at
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Weather Quick Facts

  • The highest monthly average temperature in St. Leonard for July is 79.2 degrees
  • The lowest monthly average temperature in St. Leonard for January is 37.4 degrees
  • The most monthly precipitation in St. Leonard occurs in October with 6.2 inches
  • The air quality index in St. Leonard is 3% better than the national average
  • The pollution index in St. Leonard is 86% better than the national average

Compare St. Leonard, MD Weather

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      St. Leonard Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January29°F46°F37°F2.6"
      February29°F48°F38°F2.4"
      March37°F56°F46°F3.4"
      April47°F68°F57°F4.0"
      May57°F75°F66°F4.0"
      June66°F84°F75°F4.9"
      July71°F88°F79°F3.9"
      August69°F86°F77°F5.1"
      September63°F80°F71°F4.1"
      October52°F70°F61°F6.2"
      November41°F59°F50°F3.2"
      December33°F51°F42°F3.7"

      St. Leonard air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexSt. LeonardMarylandNational
      Air quality index414342
      Pollution index384,1335,342,3672,726,193

      St. Leonard air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality304
      Days with moderate air quality58
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      St. Leonard air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.003%
      Mercury0.000%

      Average monthly St. Leonard temperature with heat index

      St. Leonard monthly precipitation with daily maximum

      St. Leonard monthly snow depth with daily maximum

      St. Leonard monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Broomes Island, MD5134118.0%
      Fishing Creek, MD2024118.0%
      California, MD14,7304118.0%
      Leonardtown, MD3,7954118.0%
      Solomons, MD2,4704118.0%
      St. Leonard, MD5494118.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Leslie, AR5493628.0%
      Smelterville, ID5494314.0%
      Terry, MT5493334.0%
      Deercroft, NC5494118.0%
      Stewartsville, NJ5494216.0%
      St. Leonard, MD5494118.0%
      Source: The St. Leonard, MD weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.